Process for forming glass articles and the apparatus for carrying out the same



' Dec. 26, 1922.

A. E. FISK. SCREENING DEVICE.

FILED FEB-R1919.

iU/Z'l'iasea:

Patented cc; 26, i922.x

ALBERTE. mean, or onIoAco, ILLInoI's, ASSIGNQB. To FREYN, nnAssnn'r @zCOMPA'NY,

or CHICAGO, rumors, A cqeroaawmn or MAINE.

I SCREENING- DEVICE] A Application filed Iiebruary 7, 1e19 Serial No. 275,540.

move fine particles, from the material which is being screened, and which will not crush material being screened. H Another object of my invention is the provision of a screening device which is self cleaning in its operation, and which will not require constant attention to keep-it in working condition.

Another, object of my invention is the provision of a screening device which will remove all fine braise from coke without breaking up the coke and, without the use of a mechanical device for. stirring the coke, which is sometimes used with a stationary screen, as otherwise as the mixed coke and" coke braise moves over the screen, only the braise carried by the lower strata of coke will l e removed. My invention gives to the coke or other material being screened atumbling action thus thoroughly removing all braise or dust which is carried by the material- My improved screen is particularly adapted for use in screening coke the operation of blast furnaces and is adapted to be installed underneath the bin so that the coke will be discharged through an opening in the bottomof the bin down upon the screening device and which, when started in operation screens and delivers the coke from the bin into a chute where it is discharged into a skip.

Another and further object of my invention is the provision of a screening device comprising in combination a revolving drum to which is secured a plurality of outwardly extending forks the tines of which are adapted to pass between the tines of stationary forks which project inwardly towards the said drum, and which act as receiving anddischarge forks for the material .to be screened. The tines. comprising all of th a e a e a e t to basal y, te pte and tobe replaced worn, as it is well kno n that material such as coke or "the like is very abrasive in its action and wears down screens or metal over which it passes attention to keep the screens from becoming cloggedduring the operation of the device. 'These and other objects of my invention will be more readily-understood by reference to the accompanying drawings and in Which Figure: 1 is a vertical sectional view of my improved screen.

Figure-2 is a horizontal sectional view looking downward upon the revolving drum and forks; and, A Figure 3 is a sectional view showing manner of arrangement of the tines of the forks. A

Referring now specifically to the drawings a hopper 9 is shown composed of plates 10, 10 and within which a revolving drum 11 is mounted upon a shaft 12 the ends of the shaft ng mounted within the side walls 10, 10. At the upper side of the hopper 9 is a receiving spout 13 which leads from a bin or other suitable source of supply,,- and through which the material flows downward upon a receiving fork, hereinafter described, by action ofgravity. A discharge spout 14: for the coarse or, screened material is provided, and another discharge spout 15 for the fine material is also provided. At the lower end of the receiving spout 13 is a receiving fork 16 comprising a plurality of the A spaced tines 1717, which are held in posiin aflords means for holding the members 26*,

26? securely in position and the members 26, 2 6 are held by means of bolts 18 19 The tines arenotched or recessed on their uppersides at their. rear ends so as to engage the member 26 and prevent movement of the tines. The tinesfl? which make up the re eivin t Pr j c n ar y t wa d he d um nd their innerell ar iu t .Q

at-wea h rea ise few 1' Th llO ' a pre-determined distance, depending upon the fineness of the particles it is desired to remove from the material, and are secured on their inner ends to the drum 11 by any suitable means, as for example a plurality of rods 23, 2 '3extending longitudinally of the drum 11 and passing through the members 20, 20, the rear ends of the tines being positioned between the members 20, 20, and forming the means for spacing the said, members apart. A discharge fork 24: is provided, the tines of which are secured to the lower wall of the discl'iarge opening 14 by means of a pair of rods 25 and 25, and projects upwardly so that its inner end is justout of contact with the drum 11. The dis charge fork 2a is composed of a plurality of tines spaced apart a predetermined distance so that the tines 0f therevolving forks 21, 21 will pass between the tines of the discharge fork 24 as the drum rotates, and has its tines recessed on their under sides a short distance from its rear end and into which the rod 25 is inserted, the rear end of the tines of the said fork 24% being recessed also and rest upon the rod 25 thus allowing for the easy removal and renewal of the tines simply by lifting up the forward end of the tine and pulling it out of place. It will thus be understood that the receiving fork 16 and the discharge fork 2 4 have their tines spaced apart, and offset out of the path of travel. of the tines of the revolving forks which have their tines spaced apart the same distance as the receivingand discharge forks, thespa'ce between the tines depending upon how much of the fine material it is desired to remove. The tines of the revolving forks'21, 21 thus pass between the tines of the receiving and discharge forks, thus picking up the coarse material lying upon the receiving fork and allowing the fine material to drop downward between thetines of the receiving fork. The nuts on the bolts 2323 follows the hopper is securely closed.

electric motor 25) is provided to which a belt 30 secured leading to a pulley 31 mounted upon the shaft 12 and secured in any suitable manner to the drum 11, thus providing means for rotating the drum 11.

The method of operation of the device is The chute 13 leads to a hopper or bin containing material to be screened and conveys the material downto and upon the receiving fork 16. It will be understood that as long as drum remains stationar material is prevented from coming through the inlet chute 13 and thus the bottom of The motor 29 may be started thus starting the drumll revolving, carrying with it the revolving forks 21, 21 which pass upward between the tines of the receiving fork 16 andcarry the coarser material over until it reaches a point above the drum whereitis dropped downward upon the revolving fork immediately preceding the fork. which has carried the coarse material off the receiving; fort, more of the finer material will pass downward between the tines of the revolving fork and the discharge fork and out through the chute 15 and the coarse material will be discharged off the back of the revolving forks and through the chute'l'c. Should any pieces of material become lodged between the tines of the forks 21, it will be dislodged as the tines of the revolvingforks pass between the tines of the discharge fork 2 1-. The fine material will pass between the tines of the receiving fork 16, also between the tines of the revolving forks 21 as the material is thrown from the forwardside of the revolving forks on to the back of the revolving fork immediately in front thereof. and on downward between the tines of the discharge fork 24'. It will thus be understood that when the skip is full or it is desired to stop the flow of the material from the coke bin, the motor is stopped, thus stopping the revolving of. the drum and preventing the material from passing downward through the inlet chute 13. It will also be understood, because of the manner jofattaching the tines of the revolving forks and discharge fork to therespective bases which holds them in position, they may be readilyremovcd should a tine become worn or broken in operation by lifting the tine at its forward end, thus disengaging the tine from the bolts. which holds it in position, when it canbe slipped out and a new tine put in its place. The tines of the re ceiving fork can also be replaced readily by removing the wedge 26 and allowing the tine to drop downward andout of engagement with the member26 when the'tine can be pulled out and a new one inserted, and the wedge 26 replaced. It will be fur- 'ther understood that the sizes of the inlet a tumbling action so as to take out of thecoke all of the braise and dust, and also that the forks may beset at such angles to increase the tumbling of the colre as it passes over the drum and through the apparatus.

And furthermore that a number of these devices may be arranged so as to grade coke or coal' or other material, one unlt taking out one size and the residue passing on to another unit and so on through any number desired, all of which arrangement I consider within the spirit and scope of my invention.

While I have described more or less precisely the details of constructions which I employ, I do not wish to be understood as limiting myself thereto, as I contemplate changes in form and the proportion of parts and the substitution of equivalents as circumstances may suggest or render expedient without departing from the spirit or scope of my invention.

I claim:

1. A screening device comprising a casing having a receiving hopper and a plurality of discharge openings at the lower side 0t said hopper, a revolving drum, sets of peripherally extending times secured to said drum, a set of spaced tines at the bottom of said receivinghopper forming a holding and receiving element for the material to be screened, and a set of spaced tines across one of said discharge openings forming a discharge element for the coarse material.

2. A screening device comprising a casing having a receiving hopper at its upper side and a plurality of discharge openings at the lower side thereof, a revolving drum, sets of peripherally extending tines secured to said drum, each set of said tines being arranged in the same plane, a set of holding tines secured to said casing and extending across the bottom of said receiving hopper, and a set of spaced tines across one of said discharge openings forming a discharge element for the coarse material. I

8. A screening device comprising a casing having a receiving hopper at its upper side and a plurality of discharge openings at the lower side thereof, a revolving drum provided with sets of spaced peripherally extending tines, each set being arranged 1n the same plane. a set of spaced tines extending across the bottom of said receiving hopper and forming a receivin and screening element for the material to be screened and a discharge element comprising a set of spaced tines across one of said discharge openings forming a discharge element for the coarse material.

a. A screening device comprising a casing having a receiving hopper at the upper side thereof, a plurality of discharge openings at the lower side thereof, a revolving drum, sets of peripherally extending tines secured to said drum, each set being arranged in the same plane, a set oi? spaced tines extending across the bottom of said receiving hopper and above one of said discharge openings. and a second set of spaced tines secured to said casing forming a discharge element for the coarse material, the said receiving element forming a screening and holding element across the bottom of said receiving hopper.

A screening device comprising the combination of a casing having a receiving hopper at its upper side, and a plurality of discharge openings at its lower side, a revolving drum, sets of spaced peripherally extending tines secured to said drum, each set being arranged in the same plane, a set of spaced tines detachably secured to said casing extending across the bottom of said receiving hopper and forming a screening and holding element for the material to be screened and a second set of tines secured to said casing forming a discharge element for the coarse screened material.

6. A screening device comprising a case having a receiving hopper at its upper side and a plurality of discharge openings at the lower side thereof, a revolving drum having sets of spaced peripherally extending tines detachably secured thereto, sets of spaced tines detachably secured to said casing and extending across the bottom of said receiving hopper forming a receiving and screening element for the material to be screened and a second set or" tines detachably secured to said casing extending across one of said discharge openings forming a screening and discharge element for the material thrown thereon from the screening tines secured to said drum.

Signed at Chicago, Illinois, this 28th day of January, 1919.

ALBERT E. FISK. 

